Scale



Aug. 10 1926.

. L. JAENICHEN ET Ai.

SCALE l 6 Shefs-Sheet 2v,

Filed May 26, 1922 IrIIIIIIIIIIIIII A TTORNE Y.

Aug. l0 1926. 1,595,197

L. JAENICHEN ET A1. SCALE ATTORN Y.

Aug. 10,1926. 555,197

L. JAENICHEN v scALg Filed May 26. 1922*? .e sheets-sheet 4,

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Aug. l0 1926.

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. L. JvAENICHEN ET Al'.

SCALE 6 Sheets-Sheet 6 Filed May 26, 1922 lll Patented Aug. 10, 1926.

UNITED STATES PATENT OFFICE.

LOUIS JAENICHEN `AND JOHN C. MATHEWS, OF DETROIT, MICHIGAN, ASSIGNORS TO THE STANDARD COMPUTING SCALE COMPANY, OF DETROIT, MICHIGAN, A COB- PORATION 0F MICHIGAN.

SCALE.

Application led May 26,

This invention relates to spring scales provided with upright indicating mechanisms which are moved consecutive distances for each increase of load on the loadreceiving portions of the scales, and its object is to provide a scale of this character with movable supporting mechainsm for the f load resisting springs so constructed that after a container or a load receiver has been placed on the scale the load resisting springs may be elevated bodily to return the weight indicator back to zero position While at the saine time a tare indicator is moved from zero a distance equal to that through which the weight indicator has been returned.

This invention consists in combination with a weight indicator and resilient loadresisting means, of a tare indicator connected to the load-resisting means, and means to change the position of the load-resisting means to move the weight indicator in one direction and the tare indicator in the opposite direction.

It further consists in weight and tare indicators concentrcally mounted so as to travel over the same circular chart.

lt also consists in an operating arm to lift the load-resisting means and means whereby the army may be accurately positioned and its movement indicated.

lt also consists in the details of constructionillustrated in the accompanying drawings and particularly pointed out in the claims.

In the accompanying drawings, Fig. 1 is a front elevation of the upper portion ofy a scale embodying our invention. Figs. 2 and 3 are together a section on the line 2-2 of Fig. 1 on a larger scale. Fig. 4 is a front elevation of the adjustable spring support. `ig. 5 is a central longitudinal section of the adjusting worm on the line 5--5 of Fig. 1. Fig. 6 is a front elevation of the support for the indicators. Fig. 7 is a section on the line 7-7 of Fig. 6. Fig. 8 is an elevation on the line 8-8 of Fig. 3. Fig. 9 is a section on the line 9--9 of Fig. 7. Fig. l() is a plan of the cross bar to which the upper ends of the springs are connected. Fig. 11 is a section on the line 11-11 of Fig. 10. Fig. 12fis a section across the front edge of the case for the indicating mechanism. Fig. 13 is an elevation of a spider to support the 1922. Serial No. 563,799.

indicators. Figs. 14 and 15 are sections on the lines 14-14 and 15-15 of Fig. 13.

Fig. 16 is an elevation of the spring-lifter lever. Fig. 17 is a section on the line 17-17 t Fig. 16. Fig. 18 is a plan of a releasing Similar reference characters refer to like parts throughout the several views.

The construction shown in Fig. 1 embodies a substantially cylindrical case 1 having a flat back 2 reinforced by a circumferential ring 3 shown in Figs. 2 and 3, and having a ring 4 at its front edge which carries a circular pane 5 of glass, held in position by occasional clips 6, as shown in Fig. 12. The case 1 has a neck 7, which in turn rests on the pedestal 8 of any desired height. This pedestal rests on a base which is not shown, but within which are the usual scale levers which connect to the Weight resisting springs 9 and to the weight indicator rod 10 of well known construction and which form no part of the present invention. It may be said that in thisscale as in many others, the rod 10 moves up and down with the lower ends of the springs.

Mounted within the case is aI spider shown in Fig. 13, having a ring 12, arms 13, 14 and 15, and a hub 16. Screws 17 extend through holes 18 in these arms and through similar holes in brackets '19 extending inward from the case 1 and shown in dotted lines in Fig. 1. A dial 21 is attached to this ring 12 and has a central hole for the hub of the tare indicator.

Referring now to Figs. 6 and 7, which show the hub 16 of the spider and the indicating mechanism, a frame is secured to this hub by means of screws 22 and consists of a front cross bar 23, a post 24 and an arm 25 which carries the adjustable bearing rings 26 and 27 and balls 28 for the collar 29 on the rear end of the weight-indicator shaft 30. Rings 31 and 32 and balls 33 support the front collar 34 on this shaft which ysupports a third collar 35 kto which the weight-indicating pointer 36 is secured by the screw 37 and Washer 38. On this shaft is a pinion 39 engaged by the rack bar 40 whose lower end connects to the rod 10. f In order to keep the rack bar in mesh with the pinion, ya guide pin 42 is mounted in the post 24, as shown in Figs. 7 and 9, and has a slot lf3 in which the rack bar is guided and a pointed supportinglug' del. This rack bar moves up and down with the load receiving parts ol the scale. that is, with the lower ends ot the springs 9.

il tare indicating' pointer Yi0 is secured to a sleeve e7 which is rotatable on the hub L18 on the cross bar 23. rl`his sleeve L17 has spur teeth which mesh with a rack bar which is guided by the clip 51 and heldin engagement with the teeth e9 by means of a spring.- arm 52, whose tension is adjustable by means ot a screw This rack bar connects to the support for the load supporting springs and the mechanism hereina'l't-er described has for its purpose. to raise the .support-ing device for the springs sufliciently to carry the weight-indicating pointer back to zero after the load container has been "laced on the scale in order to deduct the tare. The rack bars il0 and 50 are substantially parallel to each other and engage opposite sides 'of the pinions.

rlhe torce ot the. load is transmitted to the lower ends ol lthe springs 9 in any dcsirct manner and these .springs are con nected to the ends ot a cross bar 55 by means ot the bolts 5G and cupped washers 57 on which the springs are adiustably mounted. rThis cross bar rests on a pivot 5S at the upper end ot a vertically slidable rod 59 carried by the guides 60 and G1 at tached to the plate 62 which is secured to the Jiront ot the necl 7 in any desired manner. screws 68 being shown.

Extending through a slot 64 in this slidable rod 59 and mounted on the pin is a bar 6G having pins 07 in its ends to which the links (58 attach. These linlrs connect at their upper ends (Fig. 4) to the pins G9 in he end ot the bar 70 mounted on the pin 7l carried by a plate 72 atv the end oll the arrn 73 ot a bell-crank lever whose other arm 75 is the tare-control arm o't the scale. Swinging the arm 75 down toward horizontal position lilits the cross bar 55 which supports the springs and with thein the, whole weight supporting and indicating system.

The arm 7 5 is mounted on a pin 7 el carried by a' double brace 76 which extends down from the top of the case to which it is secured by the screw 77. lt is also secured to the ring- 12 by .screws 78. Its low r end is attached to the spider arm 13 by screws 79 and this lower end is formed with lugs 81 to receive the shaft 80.

Gn the outer end ot this shaft is a hand wheel or button S3 by means of which this shaft and the worm 811 thereon may be turned. its the thrust on this worm is always in one direction, one roll-er bearing 85 will be found suiiicient. This worm meshes with the worin wheel 86 which is loose on the shat 74.

The arm 75 carries a pin S7 on which two pawls 8S and 89 are mounted and these pawls are pressed avainst the teeth o't` the worm wheel 86 by the springs 90, mounted on the pins 91 (Fig. 10) and held in position by a plate 92 and screw 93. One ot these pawls is preferably one half the pitch ot the teeth. oit the worm wheel longer than the other. A pin 9e on this arm 75 carries a small dogl 95 whose long arm is adapted to be engaged by the rod 90, slidable in this arm 75. This rod is forced down by the hand of the operator pressing on the cylindrical cap 97 which is normally held out by the .spring 98. lVhen this rod 96 is pushed in., the nose 99 on the dog lifts up both pawls S8 and 89 from engagement with the worm wheel teeth. A plate 100 is ses cured to the arm 75 by means ot screws 101 and extends on the rear `side ot the worin wheel. The case 1 is formed with a circumferential slot 10Q to permit this .arm 75 to swing.

The rack bar 50 for operating the tare indicator 4G is attached to a small block formed ot two parts 101 and 105 (Fig. 10) which is rotatably mounted on the reduced upper end ot a screw 106 carried by a block 107 attached to the upper end ot the rod 59 just below the cross bar 55. This block 107 also carries a small guide bar 10S which extends between the two parts 1011 and and prevents them and the rack bar 50 from twisting. The screws 109 .secure these two parts and the rack bar 50 together. Turnw ing; this screw 106 in either direction causes the rack bars @l0 and 50 to move relative to each other as the weight rack bar 40 connects to the lever `system and therefore to the springs 9, equalizer 55 and block 107, while the tare raclr bar 50 connects to the parts 10% and 105 which are journaled on the ,screw 106 and do not move longitudinallv thereo-t when this screw is turned to move up or down relative to the block 107 and the weight7 rack bar.

A screw 1.10 is mounted in a stationary threaded boss 111 on the pedestal and when the arm 75 is released and swung up to nor mal position, the screw 106 rests on this screw 110. lVhen the screw is turned. the .screw 10G and the tare rack bar 50 move up or down so that thc tare indicator 30 may be set to zero on the chart. Then the screw 106 is turned, the block 107 and the equalizer 55 and all the parts connected thereto are moved up or down and the weight indicator vthereby set to Zero. The tare indicator .is therefore first set to zero and thereatter the weight indicator.

Then the scale is properly adjusted and empty.y the two indicating hands 36 and Lt6 l be at zero. Then an empty box. case standard container. or truck or baris placed on the scale, the hand 3G will indicate its weight, but the tare hand 4.6 will remain stationary at zero. rPhe operator, while the container remains on the scale, then swings down the arm 75, the paWls 88 and 89 riding over the teeth of the worm wheel, and he thereby lifts the rod 59, the cross bar 55, the springs 9 and the parts connected to the lower ends thereof, including the rack bar 40, until the weight hand 36 again points to zero. This movement of the lever lifts the rod 59 and with it the block 107,'the screw 106, the two parts 104 and 105 and the tare rack bar 50 and swings the tare pointer 46 in the opposite direction to the movement of the pointer 36 but to the same extent, so that the tare inter 46 will now indicate the weight o the container on the scale, that is, the tare.

When articles to be weighed are now placed in the container, the hand 36 will move and indicate the net weight thereof, but the tare indicator will remain stationary and continue to indicate the tare weight of the container.

It is evident that this scale is as adapted for ordinary weighing as any other standard scale, for when the tare hand is at zero, the total weight of any load placed on the scale is indicated by the weight hand 36. The tare mechanism remains idle unless the arm 75 is swung down.

Attention is called to the fact that the weight indicating mechanism has no connection whatever with the tare indicator and its operating mechanism and that therefore no additional friction results from this additional tare mechanism. One is entirely independent of the other in its operation. The friction of the tare mechanism is overcome by a manually operated lever and is therefore absolutely immaterial so far as the accuracy ot the scale is concerned.

It is evident thatthe teeth of the Worm wheel 86 are not sutlciently numerous for accurate adjustment when using only the pawls 88. The operator therefore moves the arm 75 until the pointer 86 is about at zero, and then turns thelmob 83 to turn the worm wheel either way as required .and swing the arm 75 until the pointer 36 is absolutely at zero.

The amo-unt of tare which can be taken care ot by this mechanism is virtually the total capacity of the scale, so long as the several parts are so proportioned as to lift the upper ends of the springs sufliciently for this purpose. This tare can be changed almost instantly and has no effect on the yweighing capacity of the scale, that is, it has no etiect on its accuracy.

The zero adjusting mechanism is not a .art ot this joint invent-ion, being the sole invention of John C. Mathews, and will be the subject matter of a separate application.

The details of construction and the proportions vof the parts may all be changed by skilled sxiaile makers without departing from the spirit of our invention as set forth in the following claims.

We claim l. In a scale, a circular graduated chart, a weight indicator and a. tare indica-tor mounted to turn over the clrart on a common axis, weight resisting means adapted to yield in proportion to the weight on the scale and an operative connection between one end thereof and the weight indicator, a movable support for the opposite end of the weight resisting means, and an operative connection between the support und the tare indicator.

2. In a scale, a circular graduated chart, a weight indicator and a tare indicator mounted to turn over the chart on a common axis, weight resisting means adapted to yield according to the weight on the scale and an operating connection between one end thereof and the weight indicator, a movable support for the opposite end oi said weight resisting means, an operative connection betweenl the support and the tare indicator, and manually operable means to position the support. n

In a scale, a. circular graduated chart, a weight indicator and a. tare indicator mounted to turn over the chart on a common axis, weight resisting means adapted to yield according to the weight on the scale and anr operating connection between one end thereot andthe weight indicator, a movable support for the opposite end of said weight resisting means, an operative connection between the support and the tare indicator, a manually operable arm adapted to position the support, means to hold the arm, and manually operable means to adjust the armholding means.

1. In a scale, a circular graduated chart, a weight indicator and a tare indicator mounted to turn over the chart on a common axis, weight resisting means adapted to yield according to the weight on the scale and an operating connection between one end the-reoi' and the weight indicator, a movable support for the opposite'end of said weight resisting means, an operative connection between the support and the tare indicator, a vertically movable bar on which the support is mounted, and means to adjust the position of the bar.

5. In a scale, a circular graduated chart, a weight indicator and a tare indicator mounted to turn over the chart on a common axis, weight resisting means adapted to yield accordin to the Weight on the scale and an operating connection between one end thereof and the Weight indicator, a movable support for the opposite end of said Weight resisting means, an operative connection between the support and the tare indicator, a. vertically movable rod on which the support is mounted, .a pivoted lever adapted to he manually operated, and linlis connecting the lever and the bar.

6. In a scale, a graduated chart, a Weight indicator and a tare indicator mounted adjacent the chart, weight resisting means adapted to yield according to the weight on the scale, a movable support there-jor, and connections between the Weight resisting means and said indicators to cause them to move in opposite directions relative to the chart as the vWeight resisting means is shitted as a whole.

7. In a scale, a iveight indicator and a tare indicator, Weight resisting springs and a support therefor, means operatively connecting said support to the tare indicator, a lever pivoted adjacent said support, means connecting one arm of the lcv r to said support tvhereby the support may he raised and loivered, a toothed abutnient idjacent the lever, means on the lever to ei,i je the abutment, and adjustable means to position the abutment.

S. In a scale, a graduated chart, Weight indicato and a tare indicator mounted ac,- `iacent the chart, Weight resisting` means adapted to yield according` to the weight on the scale, a movable support therefor, a lever to raise and loiver said support, toothed Lhe lever Wheel adjacent the lever, a paivl on i to engage the toothed Wheel to held t e lever and support in a series of ditlerent positions, and means to turn the toothed Wheel to vary the position ot the lever and support, and means connecting the tare indicator to said support.

9. In a scale, a graduated chart, pivoted Weight and tare indicators, a pinion connected to each indicator, a rack bar Jior actuating each indicator and engaging said pinions, a weight resisting` mechanism adapted to yield according to the weight on the scale and a support therefor to which is connected the rack bar 'for actuating the tare indicator, and means to position said support, said raclibars extending substantially parallel to each other and engaging opposite sides said pinions.

1G. In scale, a Weight indicator and a indicator, load .resisting means and a inovable support therefor, connections be- -ivce the Weight resisting means and the weight indicator and between the movable support and the tare indicator, manually operable. means to raise and lower said support, and means to determine the final po sition et said manually operable means.

In a scale, a graduated chart, pivoted and tare indicators, a pinion connected to each indicator, a rack bar :tor ac- "ng each indicator and engaging said y a Weight resisting mechanism pted to yield according to the Weight on scale and a support therefor to which is c, ted the rack bar for actuating the tare iueicator, means lto position said support, said rack bars extending substantially7 parallel to each other and engaging opposite sides ot' said pinions, and means to cause the weight indicator rack bar to move up and doivn with the lower ends of the springs.

ii?. In a scale, a graduated chart, pivoted 'ci lit and tare indicators, a pinion cond to each indicator, a rack bar for ac ng cach indicator and vengaging said a Weight resisting mechanism i Apted to yield according to the weight on the scale and a support therefor to which is connected the rack bar for actuating the tare indicator, means to position said sup port` said rack bars extending substantially parallel to each other and engaging opposite sides oit said pinions, and means to cause the Weight indicator rack bar to move up and doivn with the lowver ends oit the springs, said racl bars engaging opposite sides of said pinions so that a bodily movement of the springs causes the indicators to turn in opposite. directions.

LOUIS JAENICHEN. JOHN C. MATHEVS.

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